Improvement in middlings-purifiers



UNITED STATES PATENT OFFICE.

JOSEPH L. VVILLFORD, WILLIAM J. REIMERS, AND FRANCIS M. OOMSTOOK, OF MINNEAPOLIS, MINNESOTA.

IMPROVEMENT IN MIDDLINGS-PURIFIERS.

Specification four-ing part. of Letters Patent No. 153,411, dated July 21, lbl.; application tiled September 16, 1873.

To all whom it' may concern Beit known that we, JOSEPH L. WILLFORD, WILLIAM J. REIMERs, and FRANCIS M. CoM- sToCK, all of the city of Minneapolis, county of Hennepin and State of Minnesota, have made certain new and useful Improvements in Middlings-Separating Machines; and we do hereby declare the following to be a full, clear, and exact description thereof.

Figure l is a longitudinal central section. Fig. 2 is a transverse central section, and Fig. 3 is an end view.

The same letters of reference are used in the designation of identical parts.

Letter ci shows the fan-box, and letter B, Fig. l, the fan proper, letters Q Q' showing the suction-ports thereto. Letters c c', Figs. 1 and 2, show two peaked inverted cups placed at the mouth of the suction-ports, their object being to create a series of eddies, and to make the upward flow of air more uniform. Letter E designates a series of transversely-laid slats, with openings between each equal to their width, letter d showing an upper series that are movable, so that, by increasing or decreasing the width of the aperture, the volume of air may be controlled. Letter M shows the feed-hopper, and letter L the feed-roll, letters .t a' being the regulating-slides thereto. The oscillating bolt K, Figs. l and 2, is formed of two heads, L' L", two or more intervening ribs, L" L' and three longitudinally-laid slats that unite the ribs and head-pieces together. The lower head, L', has two openings near its outer diameter, K' K', which allows the passage of all refuse, as bran, that will not pass through the bolt-cloth into the conveyer-box lV, the traveler s, Fig. 1, conveying it into the conduits XV' VV', from whence it passes into the refuse-boxes r 1". The shaft F, which passes longitudinally through the center of the machine, has attached to it the oscillating bolt K and feed-roll L. Upon its outer end is placed the crank V', Fig. 1, with its adjustable crank-pin W". The connecting-rod X' connects the rotating crank-shaft V with the oscillating crank-shaft V', said connectin g-rod being adjustable at the pointy, that an even throw may be given to the oscillator k, the length of the throw being determined by the distance of the crank-pin W" from the center of the crank-shaft V'. Letters o o are adjustable hanging bars, to which the shaker P is attached, the springs o' o' being the medium of attachment. These springs are so arranged that they hold the shaker P firmly in a central position, said position being determined by the position of the hanging bars o o. Letter H shows an eccentric cam, permanently attached to the shaft a. Attached to the shaker by a hinged joint at its inner end, and straddling the eccentric cam H and shaft a with its outer end, is the reciprocating and jarring head T. Two lugs are placed at each end ofits inner straddle.

In the revolutions of the eccentric cam it forces the shaker, through the medium of the head T, against the springs o' o', which, the highest point of the eccentric having passed either of the lugs, forces the head against the hub of the eccentric cam with such force as to jar the Whole shaker, and to effectually clean the bolt-cloth, as well as to produce a more even and quicker flow of the middlin gs thereon.

Upon the oscillating bolt and shaker two grades of bolt-cloth are used, the finest grade in both cases being placed at the head thereof.

Letters S S' designate the beveled gears ordinarily used to drive the conveyer, letter R showing the conveyer proper. Letters t t', Figs. 2 and 3, show the arrangement of the cant-boards, letters U U showing the openings thereto for the admission of air. Letters A and D show portions of the frame and boarding.

The middlings to be purified are put into the hopper or feed-box IWI. The slides w are' then slightly raised. The oscillations of the feed-roll L allow the passage of the niiddlings into the head of the oscillating bolt, where they roll and slide from side to side, the refuse and bran gradually making their way over the tail end, and through the openings in the head L'. All middlings passing through the bolt-cloths upon the oscillating bolt fall upon the head of the reciprocating jarring shaker P, where they are completely purified. All parts not passing through the bolt-cloths of the shaker P are carried by its reciprocations and jars to the tail end thereof, over which they fall into the receptacle R', Fig. 1. The action of the upward volume of air is to convey the white fibrous parts of the wheat, as well as the bran, up into the exhaust-chamber, where its heavierpartieles are subjected to the influence of the eddies therein, which allows theln to fall back into the oscillating bolt, or upon the shaker, and be again acted upon, the currents of air created by the fan being just strong enough to keep the bran and light fibrous refuse out of the action of the eddies, finally ejecting them through the outer fan-port.

We are aware that the double series of slats herein described are not new, and, therefore, do not claim them.v

Having thus described our invention, what we claim as new, and desire to secure by Letters Patent, is-

1. The oscillating feed-roll L, in combination with the oscillating bolt K, substantially as and for the purpose set forth.

2. In combination with the oscillating bolt- K, the traveler s, box W, conduits W W', and receiving-boxes r fr', substantialljT as and for the purpose set forth.

3. The combination of the oscillating feedroll L, oscillating bolt K, and reciprocating shaker P, constructed and arranged to operate in the manner and for the purpose set forth.

JOSEPH L. VILLFORI). WILLIAM J. REIMERS. FRANCIS M. GOMSTOGK.

vitnesses:

VERNON BELL, LEwis MAIsi-L 

